Just finished A Game of Thrones the other day, so these stick out to me…
Not Ned’s. Ned’s is consistently described as a closure for his cloak, and while, flipping through the book, I can’t find a specific description of what it looks like, when he resigns, it’s described as ‘the ornate silver hand that is the badge of his office’ and when Robert makes him take the position again, he threatens to ‘pin it on Jaime Lannister’. So, while Martin may not have been thinking of exactly the design they used for the show, it’s certainly a brooch with a single hand.
Only two of them. When Robb accuses Osha of being an oathbreaker, she points out that she wasn’t, and couldn’t have been, because ‘the black crows got no place for women’. (Robb never refers to her in the female, in a quick reread of the scene, so I’m wondering if that was meant to suggest he didn’t realize Osha and Hali were women, or didn’t realize the Night’s Watch only took men. Neither, unfortunately, seems likely - he should know the Watch doesn’t take women, since his uncle’s one, and the Starks actually respect them, and when Osha first speaks, it’s described as a woman’s voice - so the exchange reads as clumsy exposition.)
Nitpicking aside, what’s striking to me is how many characters who are described in detail don’t match.
Tyrion is most striking, but also most forgiveable - they’d never get an actor who looks like him, or make Dinklage (or another actor) look realistically like him, so better just to stick with the ‘dwarf’ aspect - especially since people focussed more on that aspect than his twisted legs or ugly face and mismatched eyes.
Ser Jorah is described as large, hairy, and dark. Iain Glen is slender, fair, and not especially hirsute. Not especially a big deal, but a striking difference.
The Night’s Watch in general seem healthier and less repellent in the show. Yoren, in particular. It makes the fact that Yoren has survived however many years on the Wall make more sense when he’s not depicted in a way that makes you wonder how he could swing a sword or pull a bow.
Robb and Bran and Rickon, like Ser Jorah, took pretty much an opposite tack from the book descriptions - none of them have Cat’s colouring, leaving only Sansa with the Tully look - Robb might have the blue eyes, but that’s it - and, really, he looks more like Ned than Jon does.
(And add me as another who thinks Cat looks perfectly fine.)